The correct answer is d) kingdom.
Taxonomy is the branch of biology which deals in categorizing and naming of species. The modern taxonomic classification system consists of the eight taxonomic groups. These are Domain, Kingdom, Phylum, Class, Order, Family, Genus, and Species. The domain is the most inclusive of the all taxonomic groups and species is the least inclusive. It is because every different species has a unique features. In this question domain is not in the option, thus Kingdom is the correct answer As it includes different Phylum, Class, Order, Family, Genus, and Species.
Transmission electron microscope produces the image through a beam of electrons. It is most useful to inspect the morphology, cyrstallization, and magnetic characteristics of a certain sample.
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The answer is observation
The process that photoautotrophs use to produce their food is photosynthesis.
So, option d ( photosynthesis) is correct .
Photosynthesis is the process which is used by the plants . In which plants uses sunlight energy and convert carbon dioxide ,water into the molecules which is required for growth. Some of the molecules are sugar, enzymes etc.
The reaction of photosynthesis is :
6CO2 + 6H2O ------> C6H12O6 + 6O2.